Process of manufacturing insulator pins



PROCESS 0 MAE-UFACTURING INSULATOR PINS mm 0017.. 2, 1 22 L3 mmmwsmm lM. UWIT'IIN PROCESS C 15" MANUFACTURING- INSULATOR PINS mum Oct. 2. 19222 Sheets-Sheet E Wi y. L5 WW 7 aniasnir,

application filed .tlngnat t, lfltfl. flerlal llla. htfllttt.

"llhis invention relates to pins for supporting insulators or'for,.similar purposes and has for its object the production of-device'sof the class named which can be economicaltt ly manufactured and will bewell adapted to withstand the mechanical stress to which they aresubjected and which shall be of improved construction and operation.

The invention is exemplified in the comi bination and arrangement ofparts shown g in the accompanying drawings and described in thefollowing specification and it is more particularly claims. lab

pointed out in the appended la the drawings: Fig. 1 is an elevation withparts in section showing one embodiment of the present invention,

l ig. illustrates one step in the process Q lflig. 6 illustrates a stepV .manufacturing the form shown, in

1 hi 5 is a view similar to l 'i l'showin a ,v a

another modification in the process of big. ti. hig- 7' is another viewsimilar to Fig. l

showing a different form of the invention.

insulator pins for use in connection with cross arms or similar supportsare common rov ded with a shank which promote it. pp

through the cross arm and with a flange or If: other support secured tothe pinabove the tilt cross arm and resting thereon. Where woodon crossarms aroused it is an advantage to Qliave the-lower portion; of the pinlarge enough to provide'ga' somewhat extended a t hearing 'on "the"innerfface of theopening through the cross arm....; lit is alsodesirable to secure the supportat the top of the cross 1 "arm, to thepin in such afmanner that the strength of the pinis not materiallyected;

Tithe present invention provides a pin having. the above andmanufacturing such pins...

in ri i; of resta ement.- a illtts:

till trate'd ag-pin tlfl) having aflange tilt; se

a cured theretohetween the ends ofthe pin the upper and lower portionsof the pin preferably being'of su stantially' equal. di-

ameters. A thimble (12) or other bearing in the form shown in Fig. 3 thepin other desirable janalitiea L and also aflfords an eeonomical methadof n Y a-inapir portion of pin (21).

for the insulator is carried at the top of the pm and a nut (13) isthreaded on the lower end of the pin to hold it in place on the crossarm. Between the up r and lower ends of the pin there is formed grooves(it) with an intermediate flange or head (15). dlhese deformations maybe rolled into the pin or stamped with a die or formed by any othersuitable manufacturing process. 'lfh'e stock from the grooves it) willfurnish the material for the head 15) which willusually be pressedoutwardly to a diameter greater than that of the bar (10).

1 After the deformationstld) and (15.) have been formed, a supportingflange (16) is laced in position a out the, pin as shown in big. 2, Theflange (it) is provided with a air of eri heral P P P m.

a sleeve portion (17), the opening of which is preferably slightlyflared as shown in the figure and provided with a shoulder portron (18)for engaging the rib (l'5) to properly locate the flange on the pm. Apair of .dies

(19) and (20) are then. moved along thepin (id) in the direction of thearrow shown in Fig. 2 so as to clamp the flange pin so that t will takea position substantially like that shown in Fig. l. The lower die thesleeve portion (17) about the rib (15) so that a tight connection isprovided between the supporting flange and the pin. llt will be notedthat the upwardly projecting sleeve provides a reinforcement for the pinat the point where it will be subjected to greatest stress. The pin atthe top of the flange has til [(19) will force a portion of the metalinto the groove (1d) and the upper die will form its full diameter andthe portion of the pin within the cross arm is also full size.

at is provided with a squared portion iQQi which. receives a supportingflange (23). 'llhe squared surface (22) may be formed by transverselyoperatin dies, by forging or by any suitable manu acturing process. Theflange (23) is provided with an upwardly proyecting sleeve (24f) whichmay originally have a cylindrical shape correspglnding to is slid overthe pin until t registers in the squared portion, (22) when it 15pressed inwardly by dies moving transversely of the in or byanyothereuitable ptoeess. 'lhis 'orm of construction is similar itsfunction to thatiet the structure shown in Fig is sleeve 1 except thatthe flange and pin in Fig 3 have a more positive lock against relativerotary movement than is present in Fig. 1. In Fig. 5 the pin (25) isprovided with radially projecting flanges (26) which may be formed fromthe pin stock by dies operated transversely of the pin or by othersuitable manufacturing processes. A supporting flange (27 similar tothat shown in Fig. 2 is place upon the pin (25) in registration with theflanges (26) and is squeezed inwardly about the flanges by dies (28) and(29), operating in a manner described in connection with Fig. 2.' Thedie (29) is provided with a recess (30), registering with the flanges(26) so that the material of the sleeve (31) may be formed inwardlyabout the flange (26) to hold the pin and support against relativerotation as Well as against movement in the direction of the length ofthe pin. In the form shown in Fig. 7 a pin (32) has flanges (33) formedthereon similar to flanges (26) on Fig. 5. The outer edge of the flanges(33) are then threaded as shown at (34) and the supporting flange (35)is screwed into place on the thread (34). The thread alone may retainthe flange and pin in proper position meshed to the pin by means of diessimilar to those shown in connection with Figs. 2 and 6.

I claim 1. The process of manufacturing insolator pins, comdprising thesteps of deforming a bar to provi e a projection thereon, placing onsaid bar in registration with said projection, a supporting memberhaving an opening therein to receive said bar, and then .pressing saidsupporting member to form the material thereof about said projection.

2. The method of manufacturing insulator pins, comprising the steps ofdeforming a pin at a position between the ends thereof to provideabutments for resisting passage of a member along said pin, placing asleeve having a flange thereon on said pin, and pressing said sleeveinwardly to fit closely against said abutments at opposite sides thereofin the direction of the length of said pin in position to support saidpin.

3. The method of manufacturing insulator pins, comprising the steps offorcing inwardly portions of the surface of said pin to cause thematerial at adjacent portions to flow outwardly and thus form an unevensurface, placing a sleeve having a projection thereon on said pin inregistration with said surface and encasing the portion of said pinwhere the surface is pressed inwardly, and pressing the material of saidsleeve into depressions in said surface at both ends of said sleeve. tolock said sleeve on said pin.

4. The method of manufacturing insulator pins. comprising the steps ofdeforming a pin body of substantially uniform cross-section throughoutits length at a position in termediate the ends thereof by forcingportions of the material thereof inwardly and thus forming abutments toresist longitudinal rotary movement relative to said pin, placing asleeve having an openin therethrough and a flange thereon on sai pin inregistration with said abutment and in position to encase the inwardlyforced portions of said pin, andforcing said sleeve about said abutmentat each end of said sleeve by pressure exerted from opposite directionson said sleeve in the direction of the length of said pin.

5. The method of manufacturing insulator pins, comprising the steps ofrbviding a. pin body with a roughened sur ace, placing a. sleeve aboutsaid pin body in registration with said surface and extending beyondsaid surface at both ends thereof in the direction of the length of saidpin, and moving a die along the pin against said sleeve to force saidsleeve against said surface and lock the sleeve to the pin.

6. The method of manufacturing insulator pins, comprising the steps ofdeforming the surface of a pin body intermediate its ends, placing asleeve having an opening therethrough and a support attached thereto onsaid pin body in registration with said surface, forcing a die having aflaring face over said sleeve to press said sleeve against said surface,and supporting an abutment member at the end of said sleeve oppositesaid die, said abutment member having a projection thereon for forcingthe metal of said sleeve at said opposite end against said pin body.

In testimony whereof I have signed m name to this specification on this29th day of July, 1922.

ARTHUR O. AUSTIN.

